3 research outputs found
Coulomb-interaction induced incomplete shell filling in the hole system of InAs quantum dots
We have studied the hole charging spectra of self-assembled InAs quantum dots
in perpendicular magnetic fields by capacitance-voltage spectroscopy. From the
magnetic field dependence of the individual peaks we conclude that the s-like
ground state is completely filled with two holes but that the fourfold
degenerate p-shell is only half filled with two holes before the filling of the
d-shell starts. The resulting six-hole ground state is highly polarized. This
incomplete shell filling can be explained by the large influence of the Coulomb
interaction in this system.Comment: Accepted for publication in Physical Review Letter